package com.atguigu.eduservice.service.impl;

import com.atguigu.eduservice.client.VodClient;
import com.atguigu.eduservice.entity.EduVideo;
import com.atguigu.eduservice.mapper.EduVideoMapper;
import com.atguigu.eduservice.service.EduVideoService;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import javax.management.Query;
import java.util.ArrayList;
import java.util.List;

/**
 * <p>
 * 课程视频 服务实现类
 * </p>
 *
 * @author testjava
 * @since 2021-01-21
 */
@Service
public class EduVideoServiceImpl extends ServiceImpl<EduVideoMapper, EduVideo> implements EduVideoService {

    //注入vodClient
    @Autowired
    private VodClient vodClient;
    //1.根据课程id删除小节
    @Override
    public void removeVideoByCourseId(String courseId) {
        //1 根据课程id查询课程所有的视频id
        QueryWrapper<EduVideo> wrapperVideo=new QueryWrapper<>();
        wrapperVideo.eq("course_id",courseId);
        wrapperVideo.select("video_source_id");//只查询video_source_id
        List<EduVideo> eduVideoList=baseMapper.selectList(wrapperVideo);

        List<String> eduVideoStringList=new ArrayList<>();
        //将list<EduVideo>变成list<String>形式
        for(EduVideo eduVideos:eduVideoList){
            if(!StringUtils.isEmpty(eduVideos.getVideoSourceId())){
                eduVideoStringList.add(eduVideos.getVideoSourceId());
            }
        }
        //根据多个视频id删除多个视频
        if(eduVideoStringList.size()>0){
            vodClient.deleteBatch(eduVideoStringList);
        }
        QueryWrapper<EduVideo> wrapper=new QueryWrapper<>();
        wrapper.eq("course_id",courseId);
        //条件删除，根据courseId删除小节
        baseMapper.delete(wrapper);
    }
}
